Ring twisting



RING TWISTING Filed sept. 16, 1949 f zzvmvroas Jom/v MAR/E ,ufx 'w 10/575? mmm/K BY 7 o 5 U w z A Patented Nov. 11, 1952 RING TWISTING Guillaume Marie August Kayser and Johan Marie Meys, Arnhem, and Pieter van Dijk, Velp, Netherlands, assignors to American Enka Corporation, Enka, N. C., a corporation of Delaware Application September 16, 1949, Serial No. 116,144 In the Netherlands November 17, 1948 4 Claims.

This invention relates to the art of ring twisting and more particularly to novel methods and apparatus for threading-in ring twisting equipment with a running thread.

With the development of continuous spinning it was at first hoped that twisting could be included as a final operation of the process but the achievement of that objectve has been seriously hampered by the difficultie's encountered in threading in ring twisters with a thread issuing from the aftertreating equipment at speeds from 60 to 100 meters per minute.

Efforts to solve the problem are known from British Specifications 293,371; 373,791; and 343,817, according to the disclosures of which thread running to the twister is temporarily collected under tension and, While in that condition, is fixed to the twister spindle with tweezers, a rubber ring or an auxiliary loop or thread. While the procedure of these British patents affords a measure of relief from the threading in problem, operation according to their disclosures requires two-speed machines, Very skillful operators, eX- pensive temporary take-up devices and awkward location of the various components of the system.

It is therefore an object of this invention to overcome the disadvantages set forth above and to provide an inexpensive, simple and efiicient method and apparatus for threading ring twisters with threads running at spinning speeds.

According to the present invention, the thread is led to a point of temporary collection through a path which runs generally parallel to the twister spindle, the thread running in that path is engaged in the traveler of the twister ring and then the thread running between the traveler and the point of temporary collection is anchored to the spindle, after which spindle rotation is initiated.

A further object of this invention is to provide a novel twister spindle adapted to coact with a covering cap or tube in such manner that the tube may anchor the thread to the spindle and then may function as a support for the thread that is subsequently twisted.

Other objects and advantages of this invention will be apparent from the following detailed description in conjunction with the annexed drawings wherein:

Figure 1 is a schematic perspective view of ring twisting apparatus modified in accordance with the teachings of the present invention and showing an early step of the process constituting a part of this invention;

Fgure 2 is a view similar to Figure 1 but show- 2 ing a later step of the process which constitutes a part of this invention;

Figure 3 is a view similar to Figures 1 and 2 but showing a still later step in the process which constitutes a part of this invention; and,

Figure 4 is a Vertical sectional view of a twisting spindle and tube assembly constructed in accordance with the teachings of the present invention.

Referring first to Figures 1, 2 and 3, running thread 9 which is being delivered from a source IB is first led over bars I and |3 to a temporary collecting device indicated at |2 and is then threaded into pigtail guide |4 so positioned that a thread path between the guide |3 and the guide 14 is established which is generally parallel to the twister spindle which is to be threaded. In this instance the twister spindle is designated by the numeral |5 and is operated'in association with a traversing frame 6 having therein a ring I 'l on which operates a traveler IB. The reciprocation of the frame IS and the structure of the frame, the ring and the traveler is entirely conventional and need not be specifically described in this application.

The spindle, however, is not conventional but is very small in its basic diameter, say about 10 millimeters at the point of application of the lead line from the numeral |5 in Figure 4. andwis provided with enlarged portions 19 and 20 at the top and bottom, respectively, of the axial portion over which the twisted thread is colleoted. The enlarged portions |9 and 20 are frusto conical and adapted to grip and receive complementary` portions of the frusto conical hollow cap tube 2.1 which can be fitted down over the enlarged portions and frictionall7 held thereby in the manner illustrated in Figure 4. During those portions of the operation illustrated in Figures 1, 2 and 3, the tube 2| is not in position.

After the establishment of the thread path of Figure 1, the operator next pulls a loop between guides l3 and |4 and passes that loop into the traveler |8. After this operation has been accomplished, the thread path is as indicated in Figure 2. The next thing the operator does is to move the traveler |8 manually for more than about the spindle 15 to the position shown in Figure 3. The position inFigure 3 is maintained due to the small diameter of the spindle which has been indicated above as about 10 millimeters, which, compared with the ring diameter of about 52 millimeters, results in a pulling force deviating so little from the radial that the tangential component is too small to overcome the friction of the traveler |8 on the ring so that the traveler remains stationary despite movement of the thread.

At this point, if it has not been done at an earlier stage, the operator stops the rotation of the spindle |5 by pressing the brake with which twisters of this type are normally equipped. It is important to observe in reference to Figure 3 that the manual movement of the traveler |8 is in a direction opposite to the normal direction of rotation of the spindle I 5 andV that the movement is of such magnitude that points 22 and 23 on thread 9 must define an angle larger than 1S0 measured in the direction of the arrow 24.

When the traversing frame is in its lowest position such that the thread engages the spindle |5 below the plane 25-25 of Figure 4, it is necessary that the angle defined in the direction of the arrow 24 between the points 22 and 23 exceed 180, or even amount to as much as 270i.

With the thread running in the position of Figure 3, the operator grasps a tube such as the vtube 2| of Figure 4 and inserts it over the top of the spindle |5. This action causes the thread at points 22 and 23 to be clamped on the spindle |5. The pull on the thread from the temporary collecting device |2 is no longer effective above the tube 2| and, to oppose the accumula-ton of thread ahead of the point 23, and to keep the thread under tension, the operator pulls a loop manually between the guides and M.. The hand which the operator used to place `the tube 2| is withdrawn from the vicinity of the balloon which will be formed in the thread, and, as soon as the hand is clear, the spindle brake is released as a result of which twisting begins immediately.

A break occurs between the point 22 and the temporary collecting device and the thread running to the point 23 begins to undergo twisting. The Operations which take place between the application of the tube 2| and the commencement of twisting can be accomplished in something less than a second, so that the loop which is pulled between the guides |3 and |4 is very small indeed and presents no dificulties in operation.

Mechanical or magnetic slip spools can he used in lieu of the tube 2| and. it is of course understood that the cap 2| need not be closed at the top but may be an open-ended spool. It is important, however, that the interior should be frusto conical to permit rapid application to operating position during the threading in of the apparatus. Mechanical spools of the type suitable for use with the present apparatus are described in United States Patent 2,0%,930 and a suitable magnetic slip spool is disclosed in application, Serial No. 76,515.

While the process and apparatus of this invention have been described in connection With continuous spinning, the invention is equally applicable to the threading in of threads from a running sheet or Warp group.

The specific embodiments herein described are of course illustrative rather than limiting in nature and are for the purpose of instructing those skilled in the art in the practice of the invention.

What is claimed is:

1. The method of threading a ring twster With a running thread that comprises leading the running end of thread to a point of temporary collection in a path generally parallel to the twster spindle, collecting succeeding portions of the running thread at said point while drawing a portion of the running thread into the ring traveler, then rotating the traveler more than away from that radius of the spindle in which said path lies in a direction opposite to the direction of spindle rotation, anchoring the resulting loop to the spindle, initiating rotation of the spindle and breaking the thread between the point of anchorage and the point of temporary collection.

2. The method of threading a ring twster with a running thread that comprises leading the running end of thread to a point of temporary collection in a path generally parallel to the -twister spindle, collecting succeeding portions of the running thread at said point while drawing a portion of the running thread into the ring traveler, then rotating the traveler more than 180 away from that radius of the spindle in which said path lies in a direction opposite to the direction of spindle rotation, anchoring the resulting loop to the spindle, manually pulling the loop in the thread running to the spindle while initiating rotation of the spindle and breaking the thread between the point of anchorage and the point of temporary collection.

3. In apparatus for winding and twisting thread supplied from a continuous source, a ring twisting machine adapted for quick threading-in which comprises a traversing frame, a ring in said frame, a traveler on said ring, a twster spindle, a cop tube, an enlarged portion at the top of said spindle for receiving the top part of said cop tube in quick detachable engagement, an enlarged portion at the bottom of said spindle for receiving the bottom part of said cop tube in quick detachable engagement and for trapping the thread between the interior of said cop tube and said spindle, a temporary collecting device, and thread guiding means between said source and said collecting device defining a thread path generally parallel to the spindle whereby the thread can be engaged in said traveler above the traversing frame and the cop tube performs the dual function of anchoring the thread during threading-in and thereafter serves as the support for the thread package as it is formed.

4. In apparatus for winding and twisting thread supplied from a continuous source, a ring twisting machine adapted for quick threadingin which comprises a twster spindle, a ring and traveller assembly associated with said spindle, a cop tube, an enlarged portion at the top of said spindle for receiving the top part of said cop tube in quick detachable engagement, an enlarged portion at the bottom of said spindle for receiving the bottom part of said cop tube in quick detachable engagement and for trapping the thread between the interior of said cop tube and said spindle, a temporary collecting device, and thread-guiding means between said source and said collecting device defining a thread path generally parallel to the spindle, whereby the thread can be engaged in said traveller from the upper side thereof and the cop tube performs the dual function of anchoring the thread during threading-in and thereafter serves as a support for the thread package as it is formed.

GUILLAUME MARIE AUGUS'I' KAYSER. J OHAN MARIE ME'YS. PIETER VAN DIJK.

l(References on following page) 5 6 REFERENCES CITED Number Name Date h 1 d h 2,410,456 Naumann Nov. 5, 1946 fil ftlsvggelffiferens are f mo m t e 2,417,525 Smith Mar. 18, 1947 2,431,323 Graybeal Nov. 25, 1947 UNITED STATES PATENTS 5 2,468,484 Gelpke Mar. 1, 1949 Number Name Date 755,450 Carey Mar. 22, 1904 FOREIGN PATENTS 1,959,452 Welch May 22, 1934 Number Country Date 1,976,332 Curtis 0013. 9, 1934 326,452 Great Britain Mar. 11, 1930 2,246,475 Stahlecker June 17, 1941 10 

